Scale Lab scale · melody · modes · chords · sequencer · fretboard diagrams
1
Scale & Melody
no scale
▶
interval jumps
less more
Intervals
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Pitches
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Melody
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Pitches
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Root (R) is always included. No conflict restrictions — freely combine intervals, up to 12 notes total.

Included: R
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Pick notes from the current scale, in any order you like.

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2
Modes
generate scale first
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Relative = plays from the mode's own root  ·  Parallel = plays intervals from the parent key's root  ·  Make parent scale always uses parallel.
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3
Chords
generate scale first
▶
Click a chord to hear it and select it. Click and hold (500 ms) to hear it as an arpeggio. Delete or double-click to remove. Current type: Triads.
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Pick tones freely. Each tone is voiced in the lowest octave above the previous one.

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4
Sequencer
idle
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Chord Progression
Beats/chord
Available chords
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Progression
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Transport
Idle
BPM
Cycle P4 ascending
5
Diagrams
generate scale first
▶
Define your instrument. String 1 = highest/thinnest, last string = lowest/thickest.
Generate a scale, then click Generate Diagrams.
📄 User Manual
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🖥 Chrome or Edge (Mac & Windows)
  1. Visit this page in Chrome or Edge
  2. Click the ⊕ icon in the address bar (far right)
  3. Click Install — Scale Lab opens as its own app window
🍎 Safari on Mac (macOS Sonoma or later)
  1. Visit this page in Safari
  2. Click File in the menu bar → Add to Dock…
  3. Confirm the name and click Add
📱 iPhone & iPad (Safari)
  1. Visit this page in Safari
  2. Tap the Share button (box with an arrow ↑)
  3. Scroll down and tap Add to Home Screen
  4. Tap Add
🤖 Android (Chrome)
  1. Visit this page in Chrome
  2. Tap the three-dot menu → Add to Home Screen or Install app
  3. Tap Install

Once installed, Scale Lab works fully offline and launches like a native app.

Caldero Lab Apps
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🎹 Piano PDF — Include:

🎼 Staff PDF — Include: